Improvement in brushes for cleaning boiler-flues



J. ILDAVIS. BRUSH FOR CLEANING BOILER-FLUES.

atgnted May 22, 1877.

MHHESSES l N. FEI'RS. FNOTOUTHOGAPNER, WASHINGTON. D C.

UNITED STATES PATENT OFFICE JOSEPH H. DAVIS, OF SEWIOKLY, PENNSYLVANIA.

IMPROVEMENT IN BRUSHES FOR CLEANING BOILER-FLUES.

Speoifloationforming part of Letters Patent No. 190,960, dated May 22,1877; application filed November 23, 1876.

To all whom 'it may concern:

Be it known that I, JOSEPH H. DAVIS, of Of Sewickly, in the county ofAllegheny and State of Pennsylvania, have invented a certain new anduseful Improvement in Brushes for Cleaning Boiler-Fines; and I do herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, and theletters of reference marked thereon.

The nature of my invention consists in constructing a brush for cleaningthe outer surface Of ues for steam-boilers in a series of curvedsections, hln ged together so as to adapt its scouring-bristles to luesof different diameters.

To enable others skilled in the art with which myinvention is mostnearly connected to make and use it, I will proceed to describe itsconstruction and operation.

In the accompanying drawings, which fOrLn part of my specification,Figure 1 is a front view of my improvement in brush for cleaning theOuter surface of dues for boilers. Fig. 2 is a side view of one of thecurved sections of the brush. Fig. 3 is a detail view, representing themanner of hinging the sections of the brush together by means Of a link.

In the accompanying drawings, Arepresents the curved sections of thebrush, which are hinged together at B by means of pintles f, but may behinged together by means Of a link, k, as shown in Fig. 3. The bristlesg are constructed of steel, and bent in the form of the letter U, andinserted in openings in the curved plate It, which is riveted to thehinged sections A, which serve as a back plate for holding the bristlesg in place in the plate h. One of the end sections A is furnished with ahandle or lever, C, which is secured in position by means of screw-nutsD e. One of the end sections is furnished with a coupling-chain, f', asshown in Fig. l.

The skillful mechanic will readily understand the construction of myimproved brush for cleaning boiler-lines from the foregoing descriptionand by reference tO the accompanying drawings. I will, therefore,proceed to describe its operation, which is as follows: The brush isplaced around the flue A', as shown in Fig. 1, and the coupling-chain fis wound around the handle or lever C, so that the Operator can grasp itand the lever in his hand. He then gives to the leverOa reciprocatingmotion, thereby causing the brush to move from right to left around theline A', equal to the sweep given to the lever O. By the reciprocatingmotion given tO the lever and brush the operator can gradually move italong over the Hue as it is cleaned.

By constructing a brush as hereinbefore de scribed it will be adapted tofines of different diameter, and can be manufactured cheaply and withgreat facility; and it Will be very durable, and not liable to get outOf Order. Its simple construction, adaptation to liues, varying indiameter, and of different diameters, and the ease of holding the brushto its work, are some of the advantages of my improvemeut.

What I claim as Of my invention is- A brush consisting of a series ofhinged and curved sections, the end sections furnished with a lever andcoupling-chain, substantially as hereinbefore described, and for thepurpose set forth.

JOS. H. DAVIS. Witnesses:

JAMES J. JOHNSTON, A. O. JOHNSTON.

